Apparatus for cooling an annular coil constituted by a plurality of convolutions of hot wire



Dec. 16. 1969 H. E. MOBIUS 3,434,048

APPARATUS FOR COOLING AN ANNULAR COIL CONSTITUTED BY A PLURALITY OFCONVOLUTIONS OF HOT WIRE Filed March 25, 1968 3 Sheets-Sheet 1 Fly.

Dec. 16. 1969 H. E. MOBIUS 3,4

APPARATUS FOR COOLING AN ANNULAR COIL CONSTITUTED BY A PLURALITY OFCONVOLUTIONS OF HOT WIRE Filed March 25, 1968 3 Sheets-Sheet 2 Fig. 2

Dec. 16. 1969 H. E. MOBIUS 3,484,048

APPARATUS FOR COOLING AN ANNULAR COIL CONSTITUTED BY A PLURALITY OFCONVOLUTIONS OF HOT WIRE Filed March 25. 1968 3 Sheets-Sheet 3 Fig. 2

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United States Patent f 3,484,048 APPARATUS FOR COOLING AN ANNULAR COILCGNSTITUTED BY A PLURALITY 0F CONVOLU- TIGNS 0F HOT WIRE Hans EberhardMohins, Nordring 72, Volklingen, Germany Filed Mar. 25, 1368, er. No.715,770 Claims priority, application Germany, Apr. 3, 1967,

rm. or. miss 7/06 US. Cl. 239-424 Claims ABSTRACT OF TIE DISCLOSURE Thepresent invention is directed to apparatus for cooling an annular coilconstituted by a plurality of convolutions of hot wire and moreparticularly to an assemblage operably related to the annular coil forcontrolling the cooling for assuring that all convolutions are uniformlycooled.

More specifically, the present invention relates to a double walledtubular structure adapted to be inserted into the middle of the annularcoil and being so constructed and arranged that a liquid such as wateris atomized with the assistance of a fluid such as compressed air. Thedouble walled tubular structure is particularly eflicacious forutilization in system for cooling wire in connection with continuouswire rod mills.

Heretofore, it has been proposed to cool closed wire coils or wireduring the reeling thereof with finely atomized water and the coolingmedium is supplied as evenly as possible and the droplet diameter shouldbe less than 50 microns.

In accordance with an older principle, a double tube structure providedwith numerous nozzles for carrying a cooling medium or compressed airhas served for the atomization of the water during the cooling processof r the wire. The nozzles which have been used and which have beenknown for an extended period of time include a central aperture or holefrom which the water issues together with an annular aperture or gap forthe compressed air. However, such an arrangement has not been entirelysatisfactory in that the number of nozzles which can be located on thecircumference and as a consequence the uniformity of the supply of thecooling medium is limited. Furthermore, in many situations, the amountof the cooling medium issued per unit of time is not suflicient even instructures in which the nozzles on the double tubed structure have beenclosely arranged.

In connection with situations in which a relatively large amount of acooling medium must be furnished, such as for example for heavy wirecoils, it has been proposed to employ a ring nozzle (slotted nozzle) bymeans of which it is possible to issue the cooling medium uniformly andwith large amounts thereof at the same time. In this connection,attention is directed to Patent No. 3,339,373 dated Sept. 5, 1967.

The present invention is directed to an assemblage which will overcomethe objectionable characteristics of Patented Dec. 16, 1969 ICC theprior art and which includes a double walled tubular means provided withejector nozzle means which, among other advantageous results, allows thecooling medium to be issued in a uniform fashion together with largeamounts thereof as well as providing means whereby the gaps or openingsfor the liquid (water) and fluid (air) can be precisely adjustedindependently of each other wthout the necessity of arresting the flowof the liquid and fluid from the sources of supply.

More specifically, the ejector nozzle structure includes meansconstituting inner lips, providing an opening through which the liquidmay be directed and outer lips cooperable therewith for providing meansthrough which fluid may be directed.

Further objects and advantages of the present invention will become morereadily apparent to persons skilled in the art from the followingdetailed description and annexed drawings and in which drawings:

FIGURE 1 is a fragmentary vertical sectional View of a double walledtubular structure embodying the present invention,

FIGURE 2 is a view generally similar to FIGURE 1 of a modification ofthe assemblage illustrated in FIG- URE 1,

FIGURE 3 is an exploded view partly in elevation and partly in sectionof a further embodiment of the invention, and

FIGURE 4 is a View generally along the lines of FIG- URE 3 illustratingstill a further embodiment of the invention.

Referring now to FIGURE 1, there is illustrated an em bodiment of theinvention in which a double walled tubular structure provided withejector nozzle means is adapted to be juxtaposed relative to an annularcoil defined by a plurality of convolutions of hot wire for controllingthe cooling thereof in order to insure that all of the convolutions areuniformly cooled. More specifically, there is provided a central orinner tube 1 and a concentric outer tube 7 to the outer circumference orperiphery of which are fitted nozzle units N. A liquid (water) isadapted to enter the tube 1 and fluid (air) is adapted to enter thespace defined between the tube 1 and the tube 7.

Each nozzle unit N comprises a lip portion 3 and an outwardly directedportion 3A with such portions constituting a central annular chamber 4which is in communication with the interior of the tube 1 via radialtubes 2. The portions 3A are provided with an internal screw threadwhich coacts with an external screw thread 7A of the outer tube 7.Annular packings l1 and 12 are located between the portions 3A and thecircumference of the tube 7 for the customary sealing purposes.

The nozzle unit N further includes lip portions 8 spaced outwardly ofthe lip portions 3 and outwardly directed portions 8A of somewhat lessdiameter than the diameter of the portions 3A. The portions 8A areprovided with an internal screw thread which coacts with an externalscrew thread 3B of the portions 3A. An annular packing 13 is locatedbetween the portions 3A and 8A for the usual purposes.

The relationship of the lip portions 3 and 8 is such as to provide anannular chamber 6 therebetween and this chamber is in communication withthe space constituted between the tubes 1 and 7 via bores 5 and 5A inthe tube 7 and portions 3A respectively.

Due to the screw threaded connection between the portion 3A and the tube7 and the portion 8A and the portion 3A, it will be appreciated that thelip portion 8 can be displaced relative to the lip portion 3. Hence, thepresent nozzle structure permits a rapid and accurate adjustment of thethree openings or gaps, namely the liquid carrying gap, the fluid gapbetween the lip portions 8 and 3 and the openings 5 and 5A. As aconsequence, the desired droplet size can be adjusted in a simple andeasy fashion or the nozzle can be adapted to the particular requirementsinvolved.

The lip portions 3A and 8A can be secured in the desired adjustedposition by manipulation of lock nuts 10 and 10A respectively.

It is believed that the operation of each nozzle unit N is readilyapparent from the foregoing description since it is clear that theliquid entering tube 1 will leave the chamber 4 via its outlet and thefluid will leave the chamber 6 via its outlet which encompasses theoutlet of the chamber 4.

According to a further embodiment of the invention, the liquid and fluiddoes not necessarily have to issue from the unit at right angles to theaxis of the tubes 1 and 7 and in this connection attention is drawn toFIG- URE 2. It should be mentioned that this particular embodiment isespecially suitable for the cooling of the wire during reeling with theend face of the enlarging ring receiving the atomized liquid.

In the situation where the medium does not issue at right angles to theaxis of nozzle unit, the jet forms, for example, together with thebottom plate of the reel, a conical cavity which leads to a deformationof the issuing jet. To stabilize the direction of the jet, a variant ofthe invention provides for the introduction of air into the cavity thusformed. Depending upon the geometric conditions, it may suflice if afree communication is provided between the outside atmosphere and thecavity formed. If necessary, air can be furnished into such cavity witha slight positive pressure.

FIGURES 3 and 4 illustrate two forms of assemblage for the stabilizationof the jet of the nozzle in connection with an Edenborn reel.

The stabilization of the jet (FIG. 4) is accomplished either by thehollow shaft of the reel or by an air transmitting shaft in the nozzlehead which terminates below the annular nozzle and allows the conveyanceof air into the cavity form (FIG. 3). Manifestly, similar arrangementsmay be utilized in connection with a Garret reel.

It will be appreciated that in the drawings, only one liquid (water) gapor opening is illustrated but needless to say the tube 7 may be providedwith a plurality of nozzle units such as for example, when a very largecapacity of cooling medium is required. If a plurality of nozzles areemployed, all of the nozzles are advantageously directed with the centerof the jet on the center of the object to receive the cooling medium.Hence, the jet centers of the individual nozzles enclose with the axisof the tubes 1 and 7 a diiferent angle.

The type of nozzle unit described herein is also applicable When forexample, a reeled wire core is to be cooled from the exterior thereof.The essential structural features remain the same in such situations andthe inwardwhich constitutes two encircling chambers. The outer of thetwo chambers contains the liquid and the inner the fluid. The liquidpasses by way of a plurality of radial 4 tubes from the Outer chamber tothe annular chambers constituted by the lip portions. The fluid entersthe two annular chambers through apertures.

I claim:

1. Apparatus for cooling a coil of wire comprising a tubular meansadapted to be disposed in operative relationship to the coil, aplurality of annular nozzle means on the periphery of the tubular means,separate means within the tubular means for supplying liquid and airrespectively, each nozzle means including inner lip portions providingan inner chamber for the liquid and an outlet opening for the liquid,means providing communication between the inner chamber and the liquidsupplying means, outer lip portions coacting with the inner lip portionsproviding an outer chamber for the air and an outlet opening for the airsurrounding the outlet opening for the liquid, means providingcommunication between the outer chamber and the air supplying means,means for adjusting the inner lip portions relative to the tubular meansand further means for adjusting the outer lip portions relative to theinner lip portion for varying the outlet opening for liquid, the outletopening for air and the means providing communication between the outerchamber and the air supplying means.

2. The apparatus for cooling a coil of wire as claimed in claim 1 inwhich the adjusting means includes an internal screw thread on the innerlip portions cooperable with an external screw thread on the tubularmeans and the further means an internal screw thread on the outer lipportions cooperable with an external screw thread on the inner lipportions.

3. The apparatus for cooling a coil of wire as claimed in claim 1 inwhich said tubular means includes concentric inner and outer tubes,radial tubes leading from the inner tube to the chamber for the liquidwith the inner tube and radial tubes constituting the means providingcommunication between the inner chamber and the liquid supplying means,said outer tube having bores therein communicating with the chamber forthe air and the annular space between the inner and outer tubes and thebores constituting the means providing communication between the outerchamber and the air supplying means.

4. The apparatus as claimed in-claim 3 in which the axis of the chamberfor the liquid and the concentric tubes define an acute angle.

5. The apparatus for cooling a coil of wire as claimed in claim 4 inwhich the space enclosing the jet of atomized liquid and a lower limitis connected to a source of air.

References Cited UNITED STATES PATENTS EVERETT W. KIRBY, PrimaryExaminer US. Cl. X.R. 239-433

